They're rar's because they need to be compressed in some hosted accounts. Or else the file wont fit. So they take a 700 mb file and split into 6 or 7 100 mb parts. It is actually safer than having the file exposed.

Supposedly Dawn of the Dead(the first one) was a rip of the smurphs, the smurph infection thing apperantly predates it by 20 years. That is another un-based, useless facts but if you seen that one episode you can actually see it.